^ 
Cumton. —On the Isopodan Fauna of New Zealand. 149 
very short, almost linear transversely, and alihough the sixth is larger, it 
also is, I think, broader than long and not so long as the others together. 
In other species of Apseudes the sixth segment of the pleon is longer than 
the preceding five together. 
The tail-piece is triangular and is tipped with two or three short seta. 
In the terminal tail-legs the outer branch is one-half as long as the inner 
and both bear long straggling sete. 
The other appendages of the pleon appear to be about cared in structure 
between the first three pleopoda of the Amphipoda and the branchial pleopoda 
of the Isopoda. They (pl. XVIII., fig. 11) are small and each consists of a 
narrow basal-joint followed by two equal branches, the whole bearing long 
ciliated sete. They differ from the first three pairs of pleopoda of the 
Amphipoda only in the fact that the branches are not divided into many 
joints, in fact they resemble them so much and differ so much from the 
branchial sacs of the typical Isopoda that I think they cannot be used 
as respiratory organs. The possession of the appendage to the second 
maxilla points to the fact that respiration must be carried on at the 
sides of the head, as is stated by Fritz Muller to be the case with 
Tanais. 
I have taken, both on the banks of the Avon, Christchurch, and at 
Eyreton, specimens of a small tetrestrial Isopod that I at first took to be 
an Oniscus. I have however found that it cannot be distinguished in any 
specific character from Philongria rosea; I have therefore to record the 
occurrence of this species in New Zealand. 
I = the generic and specific descriptions. 
Genus Philongria, Kinahan. 
(Bate’s and Westwood’s ** British Sessile-eyed Crustacea,” vol. ii., p. 451.) 
Generic character.—‘‘ Ovate, subdepressed. Cephalon without frontal or 
lateral lobes. Outer antenne 9- or 10-jointed, with the second joint 
cylindrical; terminal joints subulated. Coxe of first and sixth rings of 
pleon obsolete. Uropoda entirely exserted ; basal portion trigonate. Outer 
ramus elongate, pointed, and exserted obliquely. Inner narrow, extending 
beyond the middle of outer, pointed." 
Philongria rosea (loc. cit., p. 460). 
Specific character.—'* Ovate scabrous, covered with small tubercles. Eyes 
small. Inner antenns conspicuous. Outer antenne with the flagellum 
slender, with apparently only four articuli, which are very difficult to detect 
_ except under a strong lens; tipped with a pencil of hairs. Terminal seg- 
ment of the pleon with the extremity truncated straight. Colour reddish, 
with whitish spots and dorsal line. 
** Length, three-twentieths of an inch." 
